[PATCH 1/2] ASoC: SOF: Prevent NULL dereference in sof_pcm_dai_link_fixup()

[Dan Carpenter]

The "dia" pointer can be NULL, so handle that condition first before
storing "dia->private".

Fixes: 839e484f9e17 ("ASoC: SOF: make struct snd_sof_dai IPC agnostic")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
 sound/soc/sof/pcm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index 1661b0bc6f12..71f5bce0c4c7 100644
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -702,7 +702,7 @@ int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_pa
 	struct snd_sof_dai *dai =
 		snd_sof_find_dai(component, (char *)rtd->dai_link->name);
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
-	struct sof_dai_private_data *private = dai->private;
+	struct sof_dai_private_data *private;
 	struct snd_soc_dpcm *dpcm;
 
 	/* no topology exists for this BE, try a common configuration */
@@ -727,6 +727,7 @@ int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_pa
 	/* read format from topology */
 	snd_mask_none(fmt);
 
+	private = dai->private;
 	switch (private->comp_dai->config.frame_fmt) {
 	case SOF_IPC_FRAME_S16_LE:
 		snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
-- 
2.20.1